自复位剪力墙结构体系的研究进展和展望

Study Progress and Prospects of Self-centering Shear Walls

通过放松剪力墙与基础之间及剪力墙与梁柱之间的约束,允许剪力墙在地震作用下发生抬升形成摇摆,通过重力荷载及预应力使剪力墙复位,形成自复位剪力墙结构。研究表明,自复位剪力墙能够在侧向结构刚度与强度无明显下降的情况下实现较大位移,且卸载后无显著残余变形及较大损伤,有利于实现震后快速恢复结构使用功能。该文首先回顾了自复位剪力墙结构的发展起源,简要介绍了自复位剪力墙结构的基本原理,详细陈述了国内外自复位剪力墙结构的相关研究发展,对相关研究的成果进行了总结,指出后张预应力限制墙高及联肢剪力墙研究匮乏等不足,提出相应的研究设想。

By releasing the restrains between the shear wall and the foundation or the shear wall and the coupling beam or end column, the shear wall is allowed to rise and shake back and forth in earthquake, and then restored through gravity loading and prestress, thus, the self-centering shear wall structure is established. The results show that the self-centering shear wall can realize massive displacement without significant strength or stiffness degradation,and has no obvious residual deformation or huge damage after uninstall, so it can be applied in structure restoration within a short period of time. This paper reviews the development history of the self-centering shear wall, makes a brief introduction to its basic mechanism, elaborates the relevant studies on self-centering shear wall at home and abroad in recent years, and summarizes the achievements and shortcomings in the field of study, with some envisaged new ideas presented.